The MR COOL 4th Generation DIY 9K BTU Wall Mount Air Handler (230V) with 25 Ft Pro Cable & Enhanced WiFi is a high-efficiency indoor unit built for fast, DIY-friendly mini-split installations. It delivers quiet, reliable heating and cooling for smaller rooms while adding app-based control and voice assistant compatibility for day-to-day convenience.
Country of Origin: China
Key Features / Specifications
- Cooling/Heating capacity: 9,000 BTU
- Voltage: 208–230V, single phase, 60 Hz
- Efficiency: up to 22 SEER (ENERGY STAR rated on the DIY 4th Gen E Star pairing)
- Coverage: up to 375 sq ft
- Enhanced WiFi: Smart control via SmartHVAC app; works with Alexa and Google Assistant
- Operating modes: Cool, Heat, Auto, Dry (dehumidify), Sleep, Fan
- Sound level: approximately 25–40 dBA (quiet operation)
- Refrigerant system (DIY 4th Gen): R-410A compatible Quick Connect design (used with the matching pre-charged line set)
- Line set sizes (typical for this 9K air handler): 1/4" liquid × 1/2" suction
- Includes: 25 ft DIY Pro Cable (added wiring protection for outdoor run), wall mounting plate, and remote
- Unit weight (typical): about 24 lb
Ideal For:
- Bedrooms, offices, small living areas, workshops, and bonus rooms up to ~375 sq ft
- DIY installs where you want no brazing and simplified setup when paired with the correct DIY condenser and quick-connect line set
- Customers who want app control + voice control and quiet comfort
- Replacing/upgrading a compatible MR COOL DIY 4th Gen indoor head on an existing system